import json
import os
from typing import Any, Dict


def data_file_path(data_dir: str, name: str) -> str:
    os.makedirs(data_dir, exist_ok=True)
    return os.path.join(data_dir, name)


def load_json(path: str) -> Dict[str, Any]:
    try:
        with open(path, 'r', encoding='utf-8') as f:
            return json.load(f)
    except FileNotFoundError:
        return {'last_update': None, 'stock_picks': [], 'stats': {}}


def save_json(path: str, data: Dict[str, Any]) -> None:
    os.makedirs(os.path.dirname(path), exist_ok=True)
    with open(path, 'w', encoding='utf-8') as f:
        json.dump(data, f, ensure_ascii=False, indent=2)